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In adults, the liver weighs a little more than 3 pounds. As you age, the liver varies in size, and certain health conditions can enlarge it. Men tend to have a larger liver size than women....
The following reference ranges (95% inclusion) are proposed: brain, 1179-1621 g; liver, 968-1860 g; spleen, 28-226 g; right lung, 155-720 g; left lung, 112-675 g; right kidney, 81-160 g; and left kidney, 83-176 g.
Research shows that people who are taller, weigh more (have a higher body mass index, or BMI), and have more lean body mass may have heavier organs.
Normal organ weights in men: part I-the heart. Molina DK, et al. Am J Forensic Med Pathol. 2012. PMID: 22182983 Table from: Normal organ weights in men: part II-the brain, lungs, liver, spleen, and kidneys. Molina DK, et al. Am J Forensic Med Pathol. 2012. PMID: 22182984 Table from: Normal Organ Weights in Women: Part I-The Heart.
For men, best-fit regression lines for median and percentiles organ weight by body weight for the heart (A), liver (B), spleen (C), and lungs (left lung, D; right lung, E). Abbreviations: P10, 10th percentile; P25, 25th percentile; P75, 75th percentile; P90, 90th percentile. Figure 2.
A human liver normally weighs approximately 1.5 kilograms (3.3 pounds) [11] and has a width of about 15 centimetres (6 inches). [12] . There is considerable size variation between individuals, with the standard reference range for men being 970–1,860 grams (2.14–4.10 lb) [13] and for women 600–1,770 g (1.32–3.90 lb). [14] .
On average, the liver of a male adult weighs around 1.5 kilograms (3.3 pounds), while the liver of a female adult weighs approximately 1.2 kilograms (2.6 pounds). This difference in weight can be attributed to the varying levels of hormones, body mass, and genetic factors between the sexes.